P2 GAS Please Help

I have been trying this event for about a week now and I dont know what to do. The closest I've gotten is only Grievous and B1 left but at that point I only had Ahsoka, C3P0 and Kenobi all at very low health. I don't know if I need better gear or mods or rng but I have not been able to complete it and it is very frustrating.
My swgoh.gg code is https://swgoh.gg/p/984746298/
Any advice would help